KR101406013B1 - 비수 전해질 2차 전지용 부극재 및 그것의 제조 방법, 및 비수 전해질 2차 전지용 부극 및 비수 전해질 2차 전지 - Google Patents
비수 전해질 2차 전지용 부극재 및 그것의 제조 방법, 및 비수 전해질 2차 전지용 부극 및 비수 전해질 2차 전지 Download PDFInfo
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- KR101406013B1 KR101406013B1 KR1020090022214A KR20090022214A KR101406013B1 KR 101406013 B1 KR101406013 B1 KR 101406013B1 KR 1020090022214 A KR1020090022214 A KR 1020090022214A KR 20090022214 A KR20090022214 A KR 20090022214A KR 101406013 B1 KR101406013 B1 KR 101406013B1
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Abstract
Description
Claims (19)
- 활성 물질 및, 부극재 중에 1 내지 20중량%의 결합제를 함유하는 비수 전해질 2차 전지 부극재를 포함하는 부극으로서,상기 활성 물질은, (A) 메디안 직경 D50이 1~20μm이고, 일반식 SiOx(1.0≤x<1.6)으로 표시되는 무정형 산화 규소 입자, 또는 상기 입자가 탄소 증착에 의해 탄소 코팅되어, 탄소 코팅량이 코팅된 입자 중 5~20질량%인 탄소 코팅 무정형 산화 규소 입자와,(B) 메디안 직경 D50이 0.1~20μm인 다결정 규소 입자, 또는 상기 다결정 규소 입자가 탄소 증착에 의해 탄소 코팅되어, 탄소 코팅량이 코팅된 입자 중 1~10질량%인 탄소 코팅 다결정 규소 입자로 이루어지고,활성 물질 중의 (B) 다결정 규소 입자의 비율이 50질량%를 넘지 않고,상기 (A) 무정형 산화 규소 입자, (B) 다결정 규소 및 결합제를 용제에 분산시킨 슬러리를 성형하여 얻어진 것인 비수 전해질 2차 전지용 부극.
- 삭제
- 삭제
- 제 1 항에 있어서, 상기 다결정 규소 입자는 X-레이 회절 분석에서, 2θ=28.4°부근의 Si(111)에 귀속되는 회절곡선의 FWHM(최대값의 반값 폭)으로부터 쉐러법에 의해 결정된 바와 같은 20 nm 내지 34 nm의 결정 크기를 가지는 것을 특징으로 하는 부극.
- 제 1 항에 있어서, 상기 다결정 규소 입자는 2.300 내지 2.320의 참비중을 가지는 것을 특징으로 하는 부극.
- 제 1 항에 있어서, 상기 다결정 규소 입자는 1,000℃ 까지의 온도에서 실란 기체의 열분해로 제조된 것을 특징으로 하는 부극.
- 제 6 항에 있어서, 상기 다결정 규소 입자는 유동층에서 실란 기체의 열분해로 제조된 미립자 다결정 규소인 것을 특징으로 하는 부극.
- 제 6 항에 있어서, 실란 기체는 실란 또는 클로로실란인 것을 특징으로 하는 부극.
- 삭제
- 활성 물질로서의 산화 규소 입자 및 규소 입자로 이루어지는 부극재에 있어서, 활성 물질 중의 규소 입자의 비율이 50질량%를 넘지 않고, 또한 부극재 중에 1~20질량%의 결합제를 함유하는 비수 전해질 2차 전지용 부극재로서,상기 산화 규소 입자는 그것의 표면이 흑연 코팅으로 코팅된 코팅 산화 규소 입자이고, 상기 코팅 산화 규소 입자의 흑연 코팅은 라만 분광학에서 1330cm-1 및 1580cm-1에서 강도 I1330 및 I1580을 가지는 산란 피크를 나타내고, 강도 비 I1330/I1580은 1.5 < I1330/I1580 < 3.0의 범위에 있고,코팅된 산화 규소 입자는 고체 NMR(29Si-DDMAS) 분석에서, -84 ppm 부근의 -45~-98ppm의 신호 면적 S-84 및 -110 ppm을 중심으로 하는 -98~-145ppm의 넓은 신호 면적 S-110을 나타내며, 면적 비 S-84/S-110은 0.5 < S-84/S-110 < 1.1의 범위에 있는 것을 특징으로 하는 비수 전해질 2차 전지용 부극재.
- 제 10 항에 있어서, 상기 산화 규소 입자는, 1,000 내지 1,500℃의 온도에서 진공하에 이산화규소와 금속 규소의 혼합물을 가열하여 산화규소 기체를 생성하고, 산화 규소 기체를 500 내지 1,100℃의 온도에서 석출시킴으로써 제조되는 것을 특징으로 하는 부극재.
- 제 10 항에 있어서, 상기 규소 입자는 다결정 규소 입자인 것을 특징으로 하는 부극재.
- 제 10 항에 있어서, 상기 규소 입자는 그것의 표면이 흑연 코팅으로 코팅된 규소 입자인 것을 특징으로 하는 부극재.
- 제 10 항에 있어서, 상기 결합제는 폴리이미드 수지를 포함하는 것을 특징으로 하는 부극재.
- 제 10 항의 부극재를 포함하고 충전 전 및 후의 부피 변화가 1.0 이상 2 미만인 비수 전해질 2차 전지용 부극.
- 제 15 항의 부극, 정극, 세퍼레이터, 및 비수 전해질을 포함하는 비수 전해질 2차 전지.
- 제 16 항에 있어서, 리튬 이온 2차 전지인 것을 특징으로 하는 비수 전해질 2차 전지.
- (I) 50 내지 30,000 Pa의 진공하에 600 내지 1,100℃에서 산화 규소 입자 상의 유기 기체 및/또는 증기의 화학기상증착법을 실행하여 산화 규소 입자의 표면을 흑연 코팅으로 코팅하는 단계, 및(II) 단계 (I)로부터 초래된 코팅된 산화 규소 입자를 규소 입자 및 결합제와 합하는 단계를 포함하는 제 10 항의 부극재를 제조하는 방법.
- 제 18 항에 있어서, 상기 단계 (I)과 단계 (II)를 통해, 산화 규소 입자 및 코팅된 산화 규소 입자는 1,100℃ 까지의 분위기에서 유지되는 것을 특징으로 하는 방법.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPJP-P-2008-067073 | 2008-03-17 | ||
JP2008067073A JP4844764B2 (ja) | 2008-03-17 | 2008-03-17 | 非水電解質二次電池負極及びそれを用いた非水電解質二次電池 |
JPJP-P-2008-109769 | 2008-04-21 | ||
JP2008109769A JP5272492B2 (ja) | 2008-04-21 | 2008-04-21 | 非水電解質二次電池用負極材及びその製造方法、ならびに非水電解質二次電池用負極及び非水電解質二次電池 |
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KR20090099487A KR20090099487A (ko) | 2009-09-22 |
KR101406013B1 true KR101406013B1 (ko) | 2014-06-11 |
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KR1020090022214A Active KR101406013B1 (ko) | 2008-03-17 | 2009-03-16 | 비수 전해질 2차 전지용 부극재 및 그것의 제조 방법, 및 비수 전해질 2차 전지용 부극 및 비수 전해질 2차 전지 |
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US (1) | US8105718B2 (ko) |
EP (1) | EP2104175B1 (ko) |
KR (1) | KR101406013B1 (ko) |
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EP2104175B1 (en) | 2019-05-22 |
US8105718B2 (en) | 2012-01-31 |
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KR20090099487A (ko) | 2009-09-22 |
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US20090239151A1 (en) | 2009-09-24 |
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